Improvement in stop and waste cocks



R. J. MALcoLM. sToP ANDy WASTE cocK.

Patented Nov. 30y

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UNITED STATES PATENT AOEErcYE.

ROBERT -J MALCOLM, OF CINCINNATI, OHIO.

IMPROVEMENT IN STOP AND WASTE COCKS.

Specification forming part of Letters Patent No. 170,576, dated November 30, 1875; application tiled october 6, 1875.

To all whom tt may concern:

Be it known that I, ROBERT J. MALCOLM, of Cincinnati, Hamilton county, Ohio, have invented certain new and useful Improvements in Stop and Waste Cocks, of which the following is a specication:

My invention relates to the combination in astop and waste cock of certain parts, which are arranged in such a manner that the moment the plug is turned, so as to shut ott' water from the service-pipe, the upper end of said pipe will be opened to the atmosphere, so as to insure the complet-e draining of the pipe,- and the consequent prevention of bursting by theaetion of't'rost.

ln the accompanying drawing, Figure l is an elevation of a service-pipe, provided with my improvements, the stop-cock, and also one 0i' the upper cocks being shown in their open condition. Fig. 2 is a vertical section through the same in the plane of the plug ot' the wastecock. Fig. 3 is a section through the air-duct at the line l l.. Fig. 4 is a section ot' the servicepi pe 'at the line 2 2. Fig. 5 is a transverse section of the plug otA the waste-cock at the line l l, said plug being turned so as to shut oft' water from the service-pipe, and allow air to enter at the upper end of the same. Fig. 6 is a transverse section ot' the aforesaid plug at the line 2 2, the waste-cock being so turned as to drain the water-pipe'. Figs. 5 4and 6 are to a larger scale than the other figures.

A represents a water-pipe. B represents the uppermost cock, valve, or bib. Coupled to the lower end ot' the pipe A is the shell C, of an ordinary stop and waste cock, said shell being traversed by a plug', D, having a 11andle, d, wherewith it is rotated, as occasion may require. This rotable plug is pierced with the customary port E and the usual wasteway e, which latter is brought in line with the discharge-spout F, when the water is turned off. Furthermore, said plug is furnished with a channel, G G,whose form ation is clearly shown in Fig. 5, in which illustration the channel is represented as al'ording communication bel tween the air pipe or duct H and the nozzle I. This air-pipe, having quit-e a limited bore, may occupy either an internal or external position with respect to the water-pipe, from whose top it extends downward to the shell C.

Where external to the pip-e its small dimensions enable it to be conducted along corners practically out of sight and liability to aceident.

The operation of my stop, waste, and veilt cock is as follows: When the handle d is in the erect position, shown in Figs. 1 and 2, the port E ot' plug D isin line with the bore of pipe A, and consequently water is free to iow into said pipe and out ot' the faucet B as soon as the latter is opened. In this position of said plug the wasteway e is brought opposite the solid portion of 'shell C, as shown in Fig. 4, thereby preventing theescape of water through the waste-spout F. This position of thel plug brings the end G of channel G G opposite another solid portion of shell C, as seen in Fig. 3, by which means communication between the air inlet I and pipe H is completely cut off. the same manner as an ordinary hydrant, the water being drawn oft' from Athe faucet B, or from any other cock or valve in communication with the pipe A; but the moment thev mospheric pressure acting 011 the limited ventv age ot' the wasteway F.

My arrangement eliectually overcomes this difficulty, because the instant that the plug D is brought around to the wasting position, the channel G Gr opens communication between the inlet I and pipe H, as seen in Fig. 5. By this means air is automatically admitted to the upper portion of pipe A, and the immediate discharge ot' its contents is atonee insured.

From the above description it will be seen that the act ot' draining the service-pipe is automatically effected by the mere closure ofthe stop-cock D, and this, without any necessity of opening the upper faucet B, to liberate the hydrostatic column.

The .apparatus now acts in With the old form of stop-valves it is always. necessary to open the uppermost :faucet of the service-pipe to insure complete drainage of the latter; but it frequently happens that this precaution is neglected, and the contents, becoming frozen, operate to burst the pipe.

As the necessity of this precautionary measure is entirely obviated by the use of my venting and Wasting stop-cock it will reduce the risk and expense attendant 011 burst pipes. The nozzles F and I are to direct the waste Water.` into the sink or drain Without coming in contact With the shell C. v

EoBEET J. MALCOLM.

Attest:

GEO. H. KNIGHT, JAMES H. LAYMAN. 

